. Carnegie Institution of Washington publication. iderablyabove a centimeter. Within this the fringes pass from fine hair-lines througha maximum and back again, apparently without rotation. To enlarge thefringes the grating G may be tilted in its own plane or a similar adjustmentmade at P. The longitudinal axes of the spectra (wire across the slit) are not in focuswith the D line; but though hazy they suffice for adjustment. Naturally thedistance FbaG is the radius of the grating R (6 feet) and the distance Sm-\-mGis R cos 6. The distances are approximately laid off and the observer at Tmay th
. Carnegie Institution of Washington publication. iderablyabove a centimeter. Within this the fringes pass from fine hair-lines througha maximum and back again, apparently without rotation. To enlarge thefringes the grating G may be tilted in its own plane or a similar adjustmentmade at P. The longitudinal axes of the spectra (wire across the slit) are not in focuswith the D line; but though hazy they suffice for adjustment. Naturally thedistance FbaG is the radius of the grating R (6 feet) and the distance Sm-\-mGis R cos 6. The distances are approximately laid off and the observer at Tmay then push the mirror M fore and aft by the aid of a lever till the Fraun-hofer lines are sharp. Unfortunately the spectra as a whole are shifted by the micrometers, to-gether when P moves and separately when M or N moves. 27. Polarization.—The two rays obtained from calc spar, if corrected forpolarization, should be available for interferences of the present kind. Nat-urally an achromatized calc-spar prism (C, fig. 41) is most convenient for the.
Size: 1291px × 1935px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidcarnegieinst, bookyear1917
